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Information card for entry 2101855
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| Coordinates | 2101855.cif |
|---|---|
| Original IUCr paper | HTML |
| Common name | magnesium hydroxide sulfate |
|---|---|
| Chemical name | magnesium hydroxide sulfate |
| Formula | H2 Mg3 O10 S2 |
| Calculated formula | H2 Mg3 O10 S2 |
| SMILES | [Mg+2].[Mg+2].[Mg+2].S(=O)(=O)([O-])[O-].S(=O)(=O)([O-])[O-].[OH-].[OH-] |
| Title of publication | Structure of Magnesium Hydroxide Sulfate [2MgSO~4~.Mg(OH)~2~], and Solid Solution in Magnesium Hydroxide Sulfate Hydrate and Caminite |
| Authors of publication | Fleet, Michael E.; Knipe, Stephen W. |
| Journal of publication | Acta Crystallographica, Section B |
| Year of publication | 1997 |
| Journal volume | 53 |
| Journal issue | 3 |
| Pages of publication | 358 - 363 |
| a | 7.454 ± 0.001 Å |
| b | 7.454 ± 0.001 Å |
| c | 12.885 ± 0.002 Å |
| α | 90° |
| β | 90° |
| γ | 90° |
| Cell volume | 716 Å3 |
| Cell temperature | 293 ± 2 K |
| Ambient diffraction temperature | 293 ± 2 K |
| Number of distinct elements | 4 |
| Hermann-Mauguin space group symbol | P 43 21 2 |
| Hall space group symbol | P 41n 2abw |
| Residual factor for all reflections | 0.1352 |
| Residual factor for significantly intense reflections | 0.0245 |
| Weighted residual factors for all reflections | 0.0227 |
| Weighted residual factors for significantly intense reflections | 0.0227 |
| Goodness-of-fit parameter for all reflections | 1.16 |
| Goodness-of-fit parameter for significantly intense reflections | 1.1604 |
| Diffraction radiation wavelength | 0.70926 Å |
| Diffraction radiation type | MoKα |
| Has coordinates | Yes |
| Has disorder | No |
| Has Fobs | No |
| Revision | Date | Message | Files |
|---|---|---|---|
| 176768 (current) | 2016-02-20 | cif/2/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/10. |
2101855.cif |
| 134621 | 2015-04-02 | The 'cif_fix_values' script with an option '--fix-only-weighting-scheme' and 'cif_filter' script were run over CIF files which included an incorrect value of the data item '_refine_ls_weighting_scheme'. Read the log for more details. There were more than 18k CIF files with values to modify. Usually these incorrect values include comment with formulas, but values of this data item must be an enumerator. The script creates new data item '_refine_ls_weighting_details' to store these comments with formulas, and writes the enumerator 'calc' as a value of data item '_refine_ls_weighting_scheme'. There exists some exceptions in the script. |
2101855.cif |
| 129439 | 2015-01-07 | cod/ (robertas@burundukas) Correcting values of _exptl_crystal_density_meas and _exptl_crystal_density_method data items: codsql "select codid from validation where message like '%\\'_exptl_crystal_density_meas\\' value \"not measured\" is %'" -NB \ | codid2file \ | xargs perl -i -pe "s/_exptl_crystal_density_meas\\s+'not +measured'/_exptl_crystal_density_meas ?/i; \ s/_exptl_crystal_density_method\\s+('not +measured'|\\?|none)/_exptl_crystal_density_method ./i" |
2101855.cif |
| 91933 | 2013-12-28 | cif/ (saulius@koala.ibt.lt) Adding DOIs that could be assigned unambiguously to the range 2x CIFs. |
2101855.cif |
| 26848 | 2011-09-28 | cif/2/, hkl/2/, html/ Reorganising CIFs of the range 2* into the "prefix-directory" tree. |
2101855.cif |
| 5310 | 2011-01-02 | cif/ Running cif_fix_enum with the core CIF dictionary on COD ranges 2, 8 and 9. Range 9 remained unchanged, and in ranges 2 and 8 there were 17309 modified files, most changes were fixes enumerator case. |
2101855.cif |
| 1153 | 2010-05-06 | cif/2/ Correcting 85 non-numeric journal issue values (consulted the original publication bibliographies in Acta Cryst. B and C). Perl multi-file replacement was used for this fix: cat manual-checks/non-numeric-journal-issue.lst \ | awk '{print substr($0,0,1)"/"$0".cif"}' \ | xargs perl -i -pe 's/(_journal_issue\s+)APR[0-9]{2}/${1}2/' Other months were replaced by manually adjusting the above expression and rerunning. All files but one come from Acta Cryst. B; the single Acta Cryst. C entry was fixed manually. |
2101855.cif |
| 966 | 2010-01-30 | cif/ Adding _cod_database_code tags to all COD entries. Adding tag description to the cif_cod.dic dictionary so that COD entries can be validated. |
2101855.cif |
| 907 | 2009-11-23 | cif/ Correcting unquoted string values starting with '['. The list of such COD entries was obtained from the PyCifRW parser error log: grep === ~/tests/pycifrw/all-cod-parse-errors.log \ | awk '{print $2}' \ | xargs perl -i -lpe "s/^(\s*)_(.*)(\s+)\[(.*)\$/\$1_\$2\$3'[\$4'/" The resulting entries were checked with 'vcif', 'cif_filter' (uses our CIFParser) and PyCifRW: svn st | grep ^M | awk '{print $NF}' | sort | xargs -n1 vcif -l 2048 svn st | grep ^M | awk '{print $NF}' | sort | xargs -n1 cif_filter > /dev/null svn st $(pwd) \ | grep ^M \ | awk '{print $NF}' \ | sort \ | xargs -n1 -iX sh -c 'cd ~/tests/pycifrw/; set -x; ./cif_reader.py X' No errors were found. |
2101855.cif |
| 846 | 2009-11-14 | cif/ Fixing _journal_volume values that had series letters prepended to them. Now the series letters are appended to the _journal_name_full, if needed, and the _journal_volume is purely numeric. To mimimise textual changes to CIFs this was done in several stages. First of all, a list of _journal_volume was compiled from the COD CIF collection: bash -xc 'find ? -name \*.cif \ | xargs cif_values \ --file \ --tag _journal_volume' \ >& cod-journal-volumes-`-date`.log & giving us a cod-journal-volumes-2009.11.13.log file (committed for reference as well). Then a list of volume names with letters was extracted and most of them transformed automatically into a correct form: awk '$3~/^[A-Z][0-9]/' cod-journal-volumes-2009.11.13.log \ | awk '{print $1}' \ | xargs -n1 -iI \ bash -c 'echo === I ===;\ awk "/^#/,/^data_/{print}/^data_/{exit}" I > tmp-$$; \ cif_adjust_journal_name_volume I \ | grep -E "_journal_name_full|_journal_volume" >> tmp-$$; \ awk "/^data_/,/\$eof/" I \ | grep -vE "^(data_|_journal_name_full|_journal_volume)" >> tmp-$$;\ mv -v tmp-$$ I' Note that this procedure assumes that all tags are at the beginning of the line, each value follows its tag on the same line, and there is only one tag per line. This procedure is not suitable for general CIFs, but fortunately, only very few CIFs in COD do not conform these rules. After the automatic conversion, a syntax check was run: svn st ? \ | awk '{print $NF}' \ | xargs -n1 -iI sh -c 'echo -n I"\r"; vcif -l 2048 I || echo "!!! I !!!\n"' Entries that were found to have errors (very few, less than 10) were reverted and fixed manually. The entries that had letters embedded into them were grepped separately: awk '$3~/[A-Z][0-9]/' cod-journal-volumes-2009.11.13.log \ | awk '$3~/^[^A-Z]/' and fixed manually. After all fixes, the previous 'vcif' test was rerun, yielding no syntax errors, and in addition a 'cif_filter' roundtrip test was run: svn st ? \ | awk '{print $NF}' \ | xargs -n1 -iI \ bash -c ' \ echo -en I "\r"; \ diff \ <(cif_filter I >& /dev/null) \ <(cif_filter I | cif_filter >& /dev/null) \ || echo "!!! I !!!\n"' This last test discovered one misspelled '_journal_yrae' tag in the 2/2003193.cif entry that was fixed by hand. |
2101855.cif |
| 340 | 2008-04-05 | Fixing CIF files headers in the CIF files from the Acta-Cryst-B/ retrospecive deposition. |
2101855.cif |
| 326 | 2008-04-03 | Adding all Acta Cryst. B, C, and E missing retrospective CIF files up to 2008 February, generated from the files that were automatically downloaded from the IUCr site. |
2101855.cif |
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Users of the data should acknowledge the original authors of the
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